The slides didn't make a lot of sense (to me) without some sort of commentary. I presume from the title I'm not supposed to be familiar with the language.
This is why I hate slideshare. It's like trying to watch a foreign film without the subtitles.
This was a talk given by Tim at the JavaScript User Group Meeting Berlin in May 2010. There is also a video of the talk, but I can't find that anymore.